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Entagling 5 photons

Scientists will soon rip open the door to real Quantum computing. Will
it be a peek into alternate universes? Or will it fizzle with a whimper?

Physicists have succeeded in entangling five photons for the first
time. Although four photons have been entangled before, five is the
minimum number needed for universal error correction in quantum
computation. Moreover, the same team has demonstrated a process called
“open-destination teleportation” for the first time (Z Zhao et al.
2004 Nature 430 54). The results represent a major breakthrough in
efforts to exploit the laws of quantum mechanics in quantum
information processing.